130 lines
3.8 KiB
ArmAsm
130 lines
3.8 KiB
ArmAsm
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/*
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* Copyright (C) 2013-2015 Linaro Ltd
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* Authors: Roy Franz <roy.franz@linaro.org>
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* Ard Biesheuvel <ard.biesheuvel@linaro.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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.macro __nop
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#ifdef CONFIG_EFI_STUB
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@ This is almost but not quite a NOP, since it does clobber the
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@ condition flags. But it is the best we can do for EFI, since
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@ PE/COFF expects the magic string "MZ" at offset 0, while the
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@ ARM/Linux boot protocol expects an executable instruction
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@ there.
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.inst 'M' | ('Z' << 8) | (0x1310 << 16) @ tstne r0, #0x4d000
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#else
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AR_CLASS( mov r0, r0 )
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M_CLASS( nop.w )
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#endif
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.endm
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.macro __EFI_HEADER
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#ifdef CONFIG_EFI_STUB
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.set start_offset, __efi_start - start
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.org start + 0x3c
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@
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@ The PE header can be anywhere in the file, but for
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@ simplicity we keep it together with the MSDOS header
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@ The offset to the PE/COFF header needs to be at offset
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@ 0x3C in the MSDOS header.
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@ The only 2 fields of the MSDOS header that are used are this
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@ PE/COFF offset, and the "MZ" bytes at offset 0x0.
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@
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.long pe_header - start @ Offset to the PE header.
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pe_header:
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.ascii "PE\0\0"
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coff_header:
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.short 0x01c2 @ ARM or Thumb
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.short 2 @ nr_sections
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.long 0 @ TimeDateStamp
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.long 0 @ PointerToSymbolTable
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.long 1 @ NumberOfSymbols
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.short section_table - optional_header
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@ SizeOfOptionalHeader
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.short 0x306 @ Characteristics.
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@ IMAGE_FILE_32BIT_MACHINE |
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@ IMAGE_FILE_DEBUG_STRIPPED |
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@ IMAGE_FILE_EXECUTABLE_IMAGE |
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@ IMAGE_FILE_LINE_NUMS_STRIPPED
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optional_header:
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.short 0x10b @ PE32 format
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.byte 0x02 @ MajorLinkerVersion
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.byte 0x14 @ MinorLinkerVersion
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.long _end - __efi_start @ SizeOfCode
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.long 0 @ SizeOfInitializedData
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.long 0 @ SizeOfUninitializedData
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.long efi_stub_entry - start @ AddressOfEntryPoint
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.long start_offset @ BaseOfCode
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.long 0 @ data
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extra_header_fields:
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.long 0 @ ImageBase
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.long 0x200 @ SectionAlignment
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.long 0x200 @ FileAlignment
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.short 0 @ MajorOperatingSystemVersion
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.short 0 @ MinorOperatingSystemVersion
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.short 0 @ MajorImageVersion
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.short 0 @ MinorImageVersion
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.short 0 @ MajorSubsystemVersion
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.short 0 @ MinorSubsystemVersion
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.long 0 @ Win32VersionValue
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.long _end - start @ SizeOfImage
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.long start_offset @ SizeOfHeaders
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.long 0 @ CheckSum
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.short 0xa @ Subsystem (EFI application)
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.short 0 @ DllCharacteristics
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.long 0 @ SizeOfStackReserve
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.long 0 @ SizeOfStackCommit
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.long 0 @ SizeOfHeapReserve
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.long 0 @ SizeOfHeapCommit
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.long 0 @ LoaderFlags
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.long 0x6 @ NumberOfRvaAndSizes
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.quad 0 @ ExportTable
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.quad 0 @ ImportTable
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.quad 0 @ ResourceTable
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.quad 0 @ ExceptionTable
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.quad 0 @ CertificationTable
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.quad 0 @ BaseRelocationTable
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section_table:
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@
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@ The EFI application loader requires a relocation section
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@ because EFI applications must be relocatable. This is a
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@ dummy section as far as we are concerned.
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@
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.ascii ".reloc\0\0"
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.long 0 @ VirtualSize
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.long 0 @ VirtualAddress
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.long 0 @ SizeOfRawData
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.long 0 @ PointerToRawData
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.long 0 @ PointerToRelocations
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.long 0 @ PointerToLineNumbers
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.short 0 @ NumberOfRelocations
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.short 0 @ NumberOfLineNumbers
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.long 0x42100040 @ Characteristics
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.ascii ".text\0\0\0"
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.long _end - __efi_start @ VirtualSize
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.long __efi_start @ VirtualAddress
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.long _edata - __efi_start @ SizeOfRawData
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.long __efi_start @ PointerToRawData
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.long 0 @ PointerToRelocations
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.long 0 @ PointerToLineNumbers
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.short 0 @ NumberOfRelocations
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.short 0 @ NumberOfLineNumbers
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.long 0xe0500020 @ Characteristics
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.align 9
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__efi_start:
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#endif
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.endm
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